George w



(No Model.)

G. W; LISK 8 C; VAN AUKEN.

PAIL BOTTOM.

I n V6 nd'o rs:

Maw

Patented Nov. 18, 1890.

m: mums runs 50., vmma-umo. msmuawu, n. c

UNITED STATES PATENT OFFICE.

GEORGE TV. LISK AND CHARLES VAN AUKEN, OF CLIFTON SPRINGS, NEIV YORK, ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, TO THE LISK MANUFACTURING COMPANY, LIMITED, OF SAME PLACE.

PAIL-BOTTOM.

SPECIFICATION forming part of Letters Patent No. 440,642, dated November 18, 1890.

Application filed June 27.1890. Serial No. 356,983. (No model.)

To all whom it may concern.

Be it known that we, GEORGE V. LIsK and CHARLES VAN AUKEN, of Clifton Springs, in the county of Ontario and State of New York, have invented a new and useful Improvement in Pail-Bottoms, which improvement is fully set forth in the following specification, and shown in the accompanying drawings.

Our invention relates to the manufacture of anti-rust sheet-metal pails and similar vessels; and the invention consists in a new construction for the bottoms of pails or other metallic vessels, said invention being hereinafter fully described, and more particularly pointed out in the claim.

Referring to the drawings, Figures 1 and2 show different stages of the process of constructing the pail-bottom, the parts being in vertical section. Fig. 3 shows a slight modification in the form of the bottom of the vessel. Fig. 4: shows the interior of the bottom of the pail or vessel.

Referring to the parts shown, A is the sheet forming the bottom, and B the sides of the pail or vessel.

E is a separate circular sheet or plate of metalas zinc, for instance-different from that of which the pail is made.

In forming this pail the circular sheet of tin A is formed with an annular groove a, preferably concentric with it. The inner wall b of this groove is preferably made inclined, as shown, While the outersidec may be made at right angles to the plane of the sheet, or, if desirable, slightly inclined in the same direction in which the side I) is inclined. (Shown in Fig. The piece of zinc E is made circular, with its edge (Z turned down uniformly all round, as shown. The slant'of the flange (Z is preferably made to correspond with the slant b of the groove. The two parts A and E, are laid together, as shown in Figs. 1 and 3, and submitted to a pressure between two heads in a direction perpendicular to the plane of the sheet. These heads may be slightly concave and convex, respectively, to give a downward sag or curve to the pail-bottom when completed,as shown in Fig. 2. The pressure between the two heads serves to crush or bend down the parts forming the groove and the flange (I to the form shown in Fig. 2, the zinc plate being on the inside of thepail. This completes the pail-bottom, so far as our invention goes. The plate of zinc E is rigidly held by the sheet A, with its upper surface even with the upper surface of said sheet.

In forming the sheet A it is sometimes de sirable to depress the metal within the groove to below the surface of the sheet without the groove, as shown in Fig. 3. This is done so that when the zinc plate is placed upon the sheet, as stated, its upper surface will be in the plane of the upper surface of the sheet. If the sheet is not depressed within the groove, but made as shown in Fig. l, the upper surfaces of the zinc plate and the sheet are brought even in the process of pressing them finally together, as above described.

What we claim as our invention is- A pailbottom formed with an annular fold, in combination with a disk of another metal than that of which the bottom is formed having its edge bent to enter said fold, the upper surface of said disk and the upper surface of the pail-bottom not covered by the disk f0rming an even or unbroken surface, substantially as shown.

In witness whereof we have hereunto set our hands this 21st day of May, 1890, in the presence of two subscribing witnesses.

GEORGE W. LISK. CHARLES VAN AUKEN. Witnesses:

E. B. WHITMORE, M. L. MODERMOTT. 

